【摘要】 北方典型硅质磷块岩分选指标易受低温因素影响。本文针对某P₂O₅品位为16.60%的中低品位磷矿,以碳酸钠为调整剂,水玻璃为抑制剂,新组合药剂HXP-7为捕收剂,在8¹0°C进行正浮选试验研究。结果表明:在磨矿细度为-0.074mm占62.87%的条件下,按照正交试验确定的最佳药剂用量,通过一次粗选、两次精选的浮选流程,开路试验获得了磷精矿P₂O₅品位为36.84%、P₂O₅回收率为87.98%,闭路试验获得了磷精矿P₂O₅品位为34.76%、P₂O₅回收率为90.48%的良好指标。更多还原

【Abstract】 The flotation index of siliceous phosphate ore in north China tends to be significantly affected by the low temperature.In this study,direct flotation tests were conducted on a mid-low grade phosphate with P₂O₅ grade of 16.60%,using sodium carbonate as regulator,sodium silicate as depressor and a new combined reagent HXP-7 as collector at a low temperature of about 8¹0°C.Results showed that with the grinding fineness being -0.074 mm 62.87%,by adding an optimal amount of reagents that was determined by the orthogonal test,the phosphate concentrate with grade of P₂O₅ 36.84% and recovery of 87.98% was produced by an open-circuit test and the phosphate concentrate with grade of P₂O₅ 34.76% and recovery of 90.48% was obtained by a closed-circuit test with the one-roughing and twocleaning flotation process.更多还原